[DML] Re: Alternate Fuels..

["jtrealtywebspannet" <jtrealty@xxxxxxxxxxxxx>]

If you look a a chart of energy densities, batteries compared to gasoline is terrible. If you compare refill/recharge times there is no comparison! Figure in the # of fill cycles and batteries are TERRIBLE. Gasoline happens to be a VERY efficient method of storing energy for portable uses. The biggest thing in gasoline's favor is that the flammability/explosive risks are already accepted by society. Try doing that today, good luck getting approved a vehicle carrying around 20 gallons of highly combustible fuel at 60 MPH! That is one of the bigger issues with Hydrogen. Never mind it is a little safer, it will rise in the atmosphere as opposed to gas which goes for the sewers to burn and explode in a confined space! We are getting WAY off-topic from Deloreans. At the present time it makes no economic sense to convert to alternative fuels, especially if it is not used regularly. Unless you use exotic (read expensive) batteries and controlers with regen braking you have very limited range. And to "refill" takes hours, not minutes. BTW, in a sense gasoline is "stored sunshine". It was originally plant matter which became crude oil and was then refined into gasoline. Too bad when you burn (oxidize) it you release carbon.
David Teitelbaum

--- In dmcnews@xxxxxxxxxxxxxxx, "Martin Gutkowski" <martin@...> wrote:
>
> Batteries ARE a more efficient way of storing mains electricity because the production of hydrogen by electrolysis, then compressing it is less efficient. 
> 
> By mass, LH2 is a better fuel than gasoline but by volume it's considerably worse!
> 
> Hydrogen is the fuel of the future, but there're too many problems to be overcome to make it economically worthwhile over petroleum fuels at the moment
> 
> 
> Sent from my BlackBerry®
> 
> -----Original Message-----
> From: Marc Levy <malevy_nj@...>
> Sender: dmcnews@xxxxxxxxxxxxxxx
> Date: Fri, 2 Mar 2012 08:08:45 
> To: <dmcnews@xxxxxxxxxxxxxxx>
> Reply-To: dmcnews@xxxxxxxxxxxxxxx
> Subject: Re: [DML] Re: Alternate Fuels..
> 
> Ignoring the solar issue (Even buying electricity from the grid is cheaper than gasoline), if we are talking about transportation using electricity the real comparison would be the "sorting" the electricity in a battery versus hydrogen.
> 
> Hydrogen seems like it is cheaper, lighter, and has less impact on the environment.
> 
> 
> --- On Fri, 3/2/12, Martin Gutkowski <martin@...> wrote:
> 
> > From: Martin Gutkowski <martin@...>
> > Subject: Re: [DML] Re: Alternate Fuels..
> > To: dmcnews@xxxxxxxxxxxxxxx
> > Date: Friday, March 2, 2012, 10:45 AM
> > Do some simple sums on the amount of
> > energy in a tank of fuel then work out how long it'd take
> > for a solar panel to transfer that energy. Factor in the
> > (in)efficiency of the hydrogen generation, and work out the
> > square yardage of panels you'd need to "re-fuel" your car in
> > a reasonable length of time. 
> > 
> > I think you'll find in very short order that what you
> > propose is thoroughly impractical and/or prohibitively
> > expensive.
> > 
> > For me it comes down to how crap solar is as a renewable
> > energy source. Wind might work on a domestic scale but your
> > neighbours might not like you for it...
> > 
> > Martin
> > 
> > Sent from my BlackBerry®
> >
> 
> 
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